This exhaust ventilation shall be provided on a continuous basis while the establishment is open for business. The fan motor wiring shall be such that the dry cleaning equipment cannot be operated unless the fan system is in operation.
Although the performance criterion above may be met, in a well-maintained and properly-operated establishment, by considerably lower ventilation rates, the following are offered at the maximum which should be necessary:
No. of Machines | Air Flow Per Machine (cfm) |
1-3 | 500 |
4-8 | 400 |
9-16 | 375 |
17 or more | 360 |
W. Va. Code R. § 64-22-5